Super generic grunt file/setup for less

Gruntfile.js

// This was set up using the help of this tut:
//http://merrickchristensen.com/articles/gruntjs-workflow.html


module.exports = function(grunt) {
    // grunt.loadNpmTasks('grunt-contrib-jshint'); // load lint

    grunt.initConfig({
        pkg: grunt.file.readJSON('package.json'),

        //watch for stuff when we save
        watch: {
            js: {
                files: ['pre/js/**/*.js'],
                tasks: ['concat:js']
            },
            less: {
                files: ['pre/less/**/*.less', 'pre/less/*.less'],
                tasks: ['less:dev']
            },
        },

        //set up concats
        concat: {
            options: {
                // Get the filepath for all js files and format it to be a
                //   separator for easier debugging in concatted files
                process: function(src, filepath){
                    var lines = '\n//--------------------------------------------------\n'
                    var final_name = filepath.substring(filepath.lastIndexOf('/scripts/') + 1, filepath.length);//.join('-');
                    return( lines
                            + '// Source: '
                            + final_name
                            + lines
                            + src);
                }
            },

            js: {
                src: [
                    'path/to/speicific/file.js', 
                    'path/to/all/files/*.js'
                ],
                dest: 'path/to/destination.js',
                nonull: true
            },//js
        },
        //set up sass
        less: {
            dev: {
                files:{
                    'path/to/compiled/css.css' : 'path/to/less/index.less'
                }
            },

            prod: {
                options:{
                    compress: true
                },
                files: {
                  'path/to/compiled/css.css' : 'path/to/less/index.less'
                }
            }
        },//sass
        
    });//initConfig

    grunt.loadNpmTasks('grunt-contrib-watch');
    grunt.loadNpmTasks('grunt-contrib-concat');
    grunt.loadNpmTasks('grunt-contrib-less');
//-----------------------------------------------------------------------------
//CUSTOM CLI COMMANDS
    grunt.registerTask('default', 'Compiles less, concats js.', function(n) {
      var tasklist = ['concat', 'less:dev'];

      //watch should always be last
      if(grunt.option('watch')) {
        tasklist.push('watch')
      }

      grunt.task.run(tasklist);
    });

    grunt.registerTask('js', 'Concats javascript files,  pass --watch to...watch the files', function(n){
      var tasklist = ['concat:js'];

      //watch should always be last
      if(grunt.option('watch')) {
        tasklist.push('watch:js');
      }

      grunt.task.run(tasklist);
    });


    grunt.registerTask('css', 'Compiles less to css, pass --watch to...watch the files', function(n){
      var tasklist = ['less:dev'];

      if(grunt.option('ie')) {
        tasklist.push('less:ie');
      }

      //Watch should always be last
      if(grunt.option('watch')) {
        tasklist.push('watch:less');
      }

      grunt.task.run(tasklist);
    });

    grunt.registerTask('prod', 'Compiles less to compressed css, uglifies javascript', function(n){
      var tasklist = ['concat:prod', 'uglify:prod', 'less:prod'];
    });
};

package.json

{
  "name": "oticon",
  "description": "Grunt tasks for oticon",
  "version": "0.1.1",
  "author": "[name]",
  "homepage": "[url]",
  
  "dependencies": {
    "grunt": "*",
    "grunt-contrib-watch": "*",
    "grunt-contrib-concat": "*",
    "grunt-contrib-less": "*",
  },
  "engine": "node *"
}